is 2 2399087 - 1
has 722198 decimal digits
takes 0.162 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBD5BEBAF5F85A99Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.844867.6471%30000001000000000.81157.8465%25.656470.1856%2.5386%
PrimeNet2590.032062.7119%100001700000.00182.4795%0.033863.6364%0.9245%
GPU722630.665365.0794%100001400000.00171.2747%0.666965.5245%0.4451%
Difference+5+24.1796+2.5677%+2990000+99860000+0.8099+6.5718%+24.9894+4.6611%+4.6611%

Known prime factors (1 factor, 74.8 bits, 0.00311838% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2399087331795804510861381262712374.8136915043191657105
34 × 5 × 17 × 139 × 7225637207
2020-07-2813972256372072,832.238.56272.024

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.232%
2010-11-08T22:12:00Jocelyn LaroucheManual testing1500015000---0.001--0.203%
2010-11-16T23:08:00Jocelyn LaroucheManual testing2000020000---0.002--0.261%
2010-12-23T04:54:00markrtiny900001845000---0.018--2.310%
2014-08-21T02:33:00Jocelyn LaroucheManual testing116754116754---0.011--0.894%
2014-11-06T23:05:00Jocelyn LaroucheManual testing143508143508---0.014--1.004%
2015-12-18T08:13:12mikrMSI300000010000000012---0.812--7.847%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-15T06:14:00Sturle Sundeghibu.ifi260261--0.064--
2012-06-02T14:43:00Sebastian HornbostelManual testing261262--0.128--
2013-01-23T08:27:00dbaughManual testing262263--0.409--
2015-03-12T10:49:00VictordeHollanderManual testing263264--0.818--
2015-03-12T10:49:00VictordeHollanderManual testing264265--1.557--
2015-11-05T09:47:19ramgeisManual testing265266--3.115--
2017-06-27T22:16:40Gordon SpenceManual testing266267--6.230--
2019-02-25T14:14:31TJAOIManual testing267268--12.46--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.231 GHz-days
Estimated T-Level:3.500
DigitsB1CurvesCompleteFacMiss
201100070 / 1000.70049.484%
255000070 / 2800.25077.845%

New Calculation Method

Total ECM effort:6.231 GHz-days
Estimated T-Level:3.500
DigitsB1CompleteFacMiss
20110002.25810.455%
25500000.20481.540%
302500000.01398.751%


ECM Summary

B1B2factorcurvesGHz-days
500005000000696.142
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-15T00:00:00ANONYMOUSv4_computersBD5BEBAF5F85A99A0.162
2018-05-18T05:12:52kkmrkkblmbrbkoldBD5BEBAF5F85A99A0.162


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-31T10:45:03Klaus Nordmannno1
33179580451086138126271
E7172CF173B48404no
2020-07-31T11:38:28SRJ2877Manual testing
33179580451086138126271
E7172CF173B48404no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 90000, B2 = 1845000 (P-1 stage 2)
B1 = 143508 (P-1 stage 1)
B1 = 116754 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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105
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107
101
102
103
104
105
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1010
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
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2100
Last modified: 2020-07-31T11:38:28+00:00